OpenCoffee is a gathering of - mostly tech minded - people at a certain day of the week in the morning in a coffee shop. At this small networking coffee meeting, the tech scene gets discussed and people have the ability to network and meet new people.

John: "Have you been at OpenCoffee this morning? I've had a great discussion with those guys from tech start up Qash!"
Eric: "Had to skip it unfortunately. Had a important deadline that day!"